Precipitated Silicone Rubber Raw Material Selection Guide

Precipitated Silicone Rubber Raw Material Selection Guide

In silicone product manufacturing, the choice of raw material determines the product’s performance, stability, and production efficiency. Precipitated silicone rubber is one of the most widely used base materials in the silicone industry. The structure, purity, and dispersibility of the raw material directly affect transparency, elasticity, processing smoothness, and final product appearance.
With so many options on the market, understanding how to select the right precipitated silicone rubber material has become essential for manufacturers and engineers.

1. What Is Precipitated Silicone Rubber Material

Precipitated silicone rubber compound uses precipitated silica (white carbon black) as its main reinforcing filler. Fine silica particles are chemically generated and mixed with silicone polymers, then refined and filtered to form a uniform raw material with excellent mechanical and optical properties.
Compared with fumed silicone rubber, precipitated silicone rubber offers a good balance of cost-effectiveness, processability, and stable elasticity. It is widely used in the production of industrial gaskets, silicone hoses, sheets, pads, and electrical insulation components.

 

2. Key Indicators When Choosing Precipitated Silicone Rubber

When selecting raw materials, the following performance parameters should be carefully evaluated to ensure consistent quality and production efficiency:

• Silica Dispersibility

Good dispersion ensures uniform reinforcement, producing smooth and defect-free surfaces. Poor dispersion can lead to whitening, bubbles, or non-uniform transparency.

• Mechanical Strength

Tensile strength, tear strength, and elongation are critical indicators. High-strength materials improve wear resistance, reduce deformation, and extend product lifespan.

• Processing Flowability

Materials with good flowability are easier to mix, extrude, and demold, reducing waste and improving overall production output.

• Transparency and Color Stability

For transparent or light-colored silicone products, high optical clarity and anti-yellowing stability are essential. Quality raw materials retain brightness even after high-temperature molding.

• Temperature Resistance

Premium precipitated silicone rubber performs reliably from -60°C to 200°C, maintaining elasticity and dimensional stability under both hot and cold conditions.

• Batch Consistency and Purity

Stable batch performance reduces the need for process adjustments, while high-purity formulations minimize impurities that may cause curing issues or reduce insulation performance.

 

3. Advantages of DIAO Precipitated Silicone Rubber Material

Among many brands, DIAO’s precipitated silicone rubber stands out for its strict quality control and consistent performance.

• High-Purity Formula
Uses high-quality precipitated silica with uniform particle distribution for superior reinforcement, improved transparency, and a denser material structure.

• Excellent Processing Performance
Smooth mixing, non-sticking, and bubble-free behavior make it suitable for compression, extrusion, and injection molding—enhancing production stability and efficiency.

• Enhanced Mechanical Properties
Finished silicone products show excellent tear strength, tensile performance, and resilience, capable of withstanding high stress, vibration, and bending cycles.

• Outstanding Thermal and Aging Resistance
Maintains elasticity and color stability in high-temperature environments and remains flexible at low temperatures without cracking.

• Strict Batch Control and Testing
Each batch is tested for viscosity, volatile content, hardness, and specific gravity to guarantee uniform performance in large-scale production.

 

4. Typical Applications

DIAO’s precipitated silicone rubber materials are widely used across industries:

• Industrial: Sealing gaskets, silicone sheets, vibration dampers, and insulation components

• Automotive: Turbocharger hoses, intake tubes, radiator hoses, and sealing rings

• Electronics: Protective sleeves, insulation parts, and wire sheaths

• Household and Appliances: Heat-resistant pads, non-slip mats, and silicone buttons

Whether the application requires high transparency or high mechanical strength, DIAO materials provide reliable and consistent performance.

 

5. Purchasing Recommendations

Define the product’s functional and performance requirements before selecting hardness and viscosity grades.

Choose suppliers with reliable quality systems and testing standards to ensure batch consistency.

For transparent or precision products, select high-purity, low-impurity materials.

Prefer suppliers who can offer technical support to optimize your production process

With strict material control and precise formulation, DIAO provides high-quality, reliable precipitated silicone rubber materials that support industrial manufacturers in achieving efficient production and long-term competitiveness.